Package org.apache.druid.segment

Class FloatColumnSerializerV2

java.lang.Object

org.apache.druid.segment.FloatColumnSerializerV2

All Implemented Interfaces:

GenericColumnSerializer<Object>, Serializer

public class FloatColumnSerializerV2
extends Object
implements GenericColumnSerializer<Object>

Column Serializer for float column. The column is serialized in two parts, first a bitmap indicating the nullability of row values and second the actual row values. This class is unsafe for concurrent use from multiple threads.

Method Summary

Modifier and Type	Method	Description
static FloatColumnSerializerV2	create(String columnName, SegmentWriteOutMedium segmentWriteOutMedium, String filenameBase, CompressionStrategy compression, BitmapSerdeFactory bitmapSerdeFactory)
long	getSerializedSize()	Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.
void	open()
void	serialize(ColumnValueSelector<?> selector)
void	writeTo(WritableByteChannel channel, FileSmoosher smoosher)	Writes serialized form of this object to the given channel.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static FloatColumnSerializerV2 create(String columnName,
                                             SegmentWriteOutMedium segmentWriteOutMedium,
                                             String filenameBase,
                                             CompressionStrategy compression,
                                             BitmapSerdeFactory bitmapSerdeFactory)

open

public void open()
          throws IOException

Specified by:

open in interface GenericColumnSerializer<Object>

Throws:

IOException

serialize

public void serialize(ColumnValueSelector<?> selector)
               throws IOException

Specified by:

serialize in interface GenericColumnSerializer<Object>

Throws:

IOException

getSerializedSize

public long getSerializedSize()
                       throws IOException

Description copied from interface: Serializer

Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.

Specified by:

getSerializedSize in interface Serializer

Throws:

IOException

writeTo

public void writeTo(WritableByteChannel channel,
                    FileSmoosher smoosher)
             throws IOException

Description copied from interface: Serializer

Writes serialized form of this object to the given channel. If parallel data streams are needed, they could be created with the provided smoosher.

Specified by:

writeTo in interface Serializer

Throws:

IOException